Best API Management Companies in California, United States
The 130 best API Management companies in California, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Postman.
Ranked: Best API Management companies in California
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Postman 🦄 Provider of platform unifying API design, testing, documentation, monitoring, and discovery | $434M | 58 mo ago | Series D | 279 | Abhinav Asthana Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+42 | — | 2 launchs |
| 2 | Salt Security 🦄 AI based API security software | $281M | 45 mo ago | Series D | 39 | Michael Nicosia Co-Founder and COO | WebflowApple iCloud MailGoogle Workspace+27 | — | — |
| 3 | MuleSoft 🦄 Cloud based API management platform | $259M | 120 mo ago | Series G | 663 663 → 1,120 (+69%) | — | WordPressMySQLMariaDB+34 | 30 patents Automated API integration, data mapping, and schema transformation for enterprise software connectivity. | 3 launchs |
| 4 | Kong 🦄 Cloud based API management and microservices connectivity platform 84Tech top 18%Patents top 20%Funding top 21%Moat top 22% All 11 signals ▾Techtop 18% Patentstop 20% Fundingtop 21% Moattop 22% Innovationtop 30% Markettop 33% Globaltop 37% Growthtop 38% Talenttop 38% Producttop 41% Newsbottom 21% Tech: 76 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Patents: 188 patents matched (strict assignee match) · 44 filings since 2022 vs 44 in 2017-21 rank vs industry peers · Fliar Intelligence Index 84/100 | $249M | 19 mo ago | Series E | 128 | Marco Palladino Co-Founder & CTO | SentryApple iCloud MailGoogle Workspace+35 | 188 patents AI-driven API gateway and microservices orchestration for intelligent query routing and documentation | — |
| 5 | Hasura 🦄 Developer of data access and AI integration software for businesses | $239M | 51 mo ago | Series C | 69 | Tanmai Gopal Co-Founder & CEO | Node.jsRadix UITailwind CSS+25 | — | — |
| 6 | Noname Security 🦄 API security platform for busniesses | $220M | 54 mo ago | Acquired | 471 | Oz Golan Co-Founder & CEO | — | — | — |
| 7 | Apigee API management and analytics software for enterprises and developers | $198M | 144 mo ago | Acquired | 404 | Sundar Pichai CEO | SalesforceBootstrapAtlassian Statuspage+19 | 10 patents API traffic management, caching, monitoring, anomaly detection, and data synchronization | — |
| 8 | Instart Cloud-based web application and API security solution | $170M | 103 mo ago | Series D | 122 | Manav Mital Co-Founder | — | 2 patents Accelerating application performance via partial file caching in network data transfer. | — |
| 9 | Apollo GraphQL 🦄 API transformation and validation tool | $152M | 58 mo ago | Series D | 248 | Geoff Schmidt Co-Founder & CEO | DatoCMSSentryAtlassian Statuspage+29 | — | — |
| 10 | WSO2 Provider of open-source platform for API management, integration, and identity | $130M | 48 mo ago | Acquired | 10 | Paul Fremantle Co-Founder & CTO | DrupalApple iCloud MailGoogle Workspace+18 | — | — |
| 11 | Traceable Security Cloud based API security solution | $110M | 25 mo ago | Series B | 98 98 → 62 (-37%) | Sanjay Nagaraj Co-Founder and CTO at Traceable.ai | WebflowSentryAtlassian Statuspage+26 | — | — |
| 12 | Cequence Cloud based platform offering API security solutions | $100M | 38 mo ago | Series C | 170 | Ameya Talwalkar Founder and CEO | WordPressApple iCloud MailMicrosoft 365+32 | — | 1 launch |
| 13 | Macrometa Cloud based data mesh and edge-integrated platforms for application development | $68M | 43 mo ago | Series B | 90 | Chetan Venkatesh Co-Founder & CEO | Node.jsZohoRadix UI+19 | 8 patents Optimizing document database garbage collection and ontology-driven backend code generation. | — |
| 14 | Transposit Cloud-based API management platform | $50M | 69 mo ago | Series B | 32 | Divanny Lamas CEO | — | 11 patents Enables low-code workflow automation and integration via actionable markdown and component relation engine | — |
| 15 | Jitterbit Platform offering API management software | $45M | 67 mo ago | Series C | 172 | Sharam Sasson Founder | Cart FunctionalityWordPressSentry+41 | 8 patents Enterprise integration middleware for API orchestration, data transformation, and query abstraction. | 1 award |
| 16 | Composio Platform to integrate AI agents and large language models with their technology stack | $29M | 14 mo ago | Series A | — | Karan Vaidya Co-Founder | WordPressMySQLPHP+32 | — | — |
| 17 | Mashery API management portal | $28M | 166 mo ago | Acqui-Hired | 97 | — | BootstrapZURB FoundationAmazon Web Services+8 | — | — |
| 18 | Mashape Unified API platform for managing, securing, and governing APIs and microservices | $28M | 110 mo ago | Acquired | 211 | — | — | 2 patents Cloud-based API management and gateway platform for distributing and consuming web services | 1 launch |
| 19 | Akana API management solutions provider | $26M | 146 mo ago | Acquired | 162 | Eric Pulier Founder | DrupalBugHerdAtlassian Statuspage+27 | 6 patents Automated generation and management of dynamic data schemas/ontologies for software integration | 1 job opening |
| 20 | Speakeasy Online platform providing multi-disciplinary learning solutions | $26M | 19 mo ago | Series A | 1 | Simon Yu Co-Founder & Chief Operating Officer | Node.jsThree.jsRadix UI+26 | 7 patents Patents concentrated in computing, sensing & instrumentation | — |
| 21 | Bright Security Platform offering security testing software | $25M | 12 mo ago | Series A | 135 | Bar Hofesh Co-Founder | CTO | WordPressApple iCloud MailMySQL+26 | — | — |
| 22 | Paragon Platform offering API integration solution | $21M | 20 mo ago | Series A | 44 | Brandon Foo Co-Founder & CEO | Framer SitesReactKnockout.js+33 | 856 patents Patient-specific orthopedic surgical guides and fixation implants for bone repair and joint replacement | 1 launch |
| 23 | Neosec Platform offering cloud based application programming interface security provider | $21M | 57 mo ago | Acqui-Hired | 47 | Giora Engel Co-Founder | — | — | — |
| 24 | Wallarm API security platform delivering complete protection against attacks and abuse | $20M | 10 mo ago | Series C | 6 | Stepan Ilyin Co-Founder | WordPress Block EditorWordPressMySQL+31 | 10 patents AI-driven API security and L7 threat detection for firewalls and IDS | — |
| 25 | Pipedream Cloud based API integration platform | $20M | 49 mo ago | Acquired | 8 | Jason Endo Co-Founder | Node.jsClerkRadix UI+23 | — | — |
| 26 | Moesif Provider of API testing and monitoring tools | $16M | 57 mo ago | Acquired | 17 17 → 15 (-12%) | Derric Gilling Co-founder & CEO | Azure Front DoorAzureReact+19 | 10 patents API usage analytics and management platform for monitoring, security, retention, and sampling. | — |
| 27 | Speakeasy Platform offering API management solution | $15M | 36 mo ago | Seed | 28 28 → 45 (+61%) | Sagar Batchu Co-Founder & CEO | — | 7 patents Personalized interactive display systems integrating environmental controls and social-driven product recommendations. | 1 job opening · 1 partnership |
| 28 | DreamFactory Provider of secure, self-hosted enterprise data access platform that provides governed API access to any data… | $13M | 138 mo ago | Series C | 5 | — | HubSpot CMS HubFacebook LoginLinkedin Sign-in+36 | — | 1 launch |
| 29 | ReadMe Documentation and digital transaction management software | $9M | 81 mo ago | Series A | 66 | Gregory Koberger Founder | SentryReadMeBootstrap+29 | — | 1 launch |
| 30 | StrongLoop Platform offering API development solution | $9M | 153 mo ago | Acqui-Hired | 32 | — | — | 11 patents Dynamic JavaScript API generation and routing for server-side application integration | — |
| 31 | Apiary API design, development, documentation platform for developers, fostering collaboration and innovation | $8M | 130 mo ago | Acquired | 30 | — | Backbone.jsUnderscore.jsLodash+8 | — | — |
| 32 | StepZen Cloud-based API development solution provider | $8M | 65 mo ago | Acquired | 16 | — | — | — | — |
| 33 | Platformatic API development software for developers | $8M | 20 mo ago | Seed | 9 | Matteo Collina Co-Founder | DocusaurusRadix UITailwind CSS+15 | — | — |
| 34 | Grafbase Cloud-based API management solutions provider | $7M | 43 mo ago | Seed | 19 | Fredrik Bjork Founder & CEO | SentryAlgoliaNode.js+19 | — | — |
| 35 | Runscope API monitoring platform ensuring uptime, performance, and data validation | $7M | 146 mo ago | Acquired | 50 | — | — | — | — |
| 36 | Refold AI Provider of AI agents for enterprise-grade software integrations and automation | $6M | 11 mo ago | Seed | — | Jugal Anchalia Co-Founder & CEO | Apple iCloud MailGoogle WorkspaceNode.js+23 | — | — |
| 37 | WireMock Cloud based API mocking software | $6M | 36 mo ago | Seed | 4 | Uri Maoz CEO & Co-Founder at WireMock | WebflowEmotionVWO+24 | — | — |
| 38 | build.security Secure application authorization platform | $6M | 67 mo ago | Acqui-Hired | 22 | — | — | — | — |
| 39 | NightVision Platform offering security testing software | $5M | 15 mo ago | Series A | — | Kinnaird McQuade Founder & CEO | WebflowFreshworks CRMreCAPTCHA+10 | — | — |
| 40 | Inigo Provider of a service that will be discontinued in August 2025 | $4M | 39 mo ago | Seed | 12 | — | — | 4 patents Patents concentrated in computing, sensing & instrumentation | — |
| 41 | Akto Platform offering API security solution | $4M | 43 mo ago | Seed | 10 | Ankush Jain Co-Founder & CTO | Framer SitesYouTubeReact+22 | — | — |
| 42 | Aklivity Platform offering API management software | $4M | 48 mo ago | Seed | 10 | Leonid Lukyanov CEO & Founder | WebflowGSAPCloudflare Turnstile+14 | — | — |
| 43 | Apible API testing solutions provider | $4M | 67 mo ago | Series A | — | Jakub Roztocil Founder & CEO | — | — | — |
| 44 | LOGIQ Cloud-based observability software provider | $3M | 60 mo ago | Acquired | 16 | Abhijit Khinvasara Co-Founder | — | — | — |
| 45 | HyperTest Platform offering API testing software | $2M | 42 mo ago | Seed | 13 | Karan Raina Co-Founder & CTO | Wix eCommerceWixSentry+28 | — | — |
| 46 | Unkey Platform providing API key management solutions | $2M | 31 mo ago | Seed | — | Andreas Thomas Co-Founder & CTO | TurbopackNode.jsRadix UI+14 | — | — |
| 47 | Keploy Developer of open-source platform for API, integration, and unit testing | $1M | 51 mo ago | Seed | 10 | Shubham Jain Co-Founder | NacelleNode.jsGraphQL+22 | — | — |
| 48 | Monster API Platform offering API integration solutions | $1M | 36 mo ago | Seed | 3 | Saurabh Vij Co-Founder & CEO | TypeScriptMantineBootstrap+25 | — | — |
| 49 | KushoAI Provider of an AI-powered platform for software reliability and security | $600K | 27 mo ago | Seed | — | Sourabh Gawande Co-Founder & CTO | GhostNode.jsVarnish+19 | — | — |
| 50 | Subtrace Cloud based API monitoring platform | $500K | 12 mo ago | Seed | — | Sachin Sridhar Co-Founder & CTO | — | — | — |
Top 12 API Management companies in California
#1
Kong 🦄Series E · San Francisco, California · founded 2009 · 128 employees$249.3Mraised▾
Cloud based API management and microservices connectivity platform. It operates through RESTful API and is built on NGINX. It inspects and monitors APIs and microservice traffic. It provides ready to deploy plugins and adds functionality to APIs and applications. It also offers the flexibility to run on the cloud of the users choice such as AWS, Azure, Google Cloud. It has clients such as Cisco, GSK, Paypal, etc.
- Nov 2024Series E—
- Aug 2024Series D$80M
- Dec 2020Series D$100M
- Dec 2018Series C$43M
#2
Series C · San Francisco, California · founded 2013 · 6 employees$20.1Mraised▾
API security platform delivering complete protection against attacks and abuse. It is a B2B SaaS company that provides a comprehensive solution for application and API security. The platform offers advanced API security, including API discovery, security testing, and abuse prevention. It helps organizations discover all APIs, detect and stop attacks, respond to incidents, and test APIs for security issues. It caters to various industries, including technology, healthcare, fintech, and e-commerce, and supports multiple cloud platforms like AWS, GCP, and Azure. The platform provides real-time API threat protection, AI agent security, and API SOC services. It offers features such as credential stuffing detection, API leak management, and cloud-native WAAP. The company focuses on protecting APIs and AI agents from threats, providing visibility, automated response, and integrations.
- Jul 2025Series C$55M
- Sep 2023Series A$9.2M
- Oct 2018Series A$8M
- Dec 2016Series A$2.3M
#3
Series A · San Rafael, California · founded 2018 · 135 employees$25Mraised▾
Platform offering security testing software. The platform identifies any vulnerabilities in the application. It automatically tests every aspect of applications, APIs web sockets, or mobile. The platform leverages AI to understand the application architecture and generate sophisticated and targeted attacks.
- May 2025Series A$1M
- Mar 2022Series A$20M
- Oct 2020Seed$4.7M
#4
Series A · San Francisco, California · founded 2023$29Mraised▾
Platform to integrate AI agents and large language models with their technology stack. The platform enables developers to integrate AI capabilities into their applications, streamlining the development process. It supports unlimited integrations, suitable for individual developers, startups, and large enterprises. It emphasizes data protection through security measures such as encryption and secure access protocols.
- Mar 2025Series A$25M
- Jul 2023Seed$4M
#5
Seed · San Mateo, California · founded 2023$6.5Mraised▾
Provider of AI agents for enterprise-grade software integrations and automation. The agents handle custom logic, legacy systems, and unpredictable APIs. This allows teams to focus on product development. The platform offers memory graphs, real-time adaptation, and auto-fixing workflows. It supports workflow creation, data mapping, test case writing, and integration infrastructure. The agents can be deployed in managed cloud, self-hosted cloud, or customer environments.
- Jun 2025Seed$6.5M
#6
Series A · Mountain View, California · founded 2022 · 1 employees$25.9Mraised▾
Online platform providing multi-disciplinary learning solutions
- Oct 2024Series A$15M
- Jun 2023Series A$7.6M
- 2022Series A$3.3M
#7
Series A · Los Angeles, California · founded 2019 · 44 employees$21Mraised▾
Platform offering API integration solution. It accelerates the integration process and provides a managed authentication for every integration. The platform enables developers to define integration logic using workflows. The features of the product include end-to-end visibility, debugging, scalability, zero maintenance, and low-code workflow building.
- Oct 2024Series A$5.5M
- Jul 2022Series A$13M
- Jul 2020Seed$2.5M
#8
Series A · Los Angeles, California · founded 2022$5.4Mraised▾
Platform offering security testing software. It enables users to identify security issues or vulnerabilities in the code within the CI and CD pipelines. It enables users to examine the web applications and APIs to identify false positives.
- Mar 2025Series A$6.9M
- Apr 2024Seed$5.4M
#9
Series B · San Francisco, California · founded 2018 · 98 employees$110.2Mraised▾
Cloud based API security solution. The platform uses distributed tracing, cloud-native integrations, and behavioral analytics to deliver application and API security. It enables users to discover, monitor, visualize, and correlate application code changes to transactions, API endpoints, and specifications. The platform allows users to track and discover changes to the API in real time.
- May 2024Series B$30M
- May 2022Series B$60M
- Feb 2021Angel$250K
- Jul 2020Series A$20M
#10
Seed · San Francisco, California · founded 2022 · 9 employees$7.8Mraised▾
API development software for developers. It offers a DB tool that enables developers to develop both open API and Grapghql schema APIs. It allows users to access open API composition, analyze services, and manage code updates. The platform supports databases such as SQLite, MySQL, MariaDB, and more.
- Sep 2024Seed$4.3M
- Jun 2023Seed$3.5M
#11
Seed · San Francisco, California · founded 2024$500Kraised▾
Cloud based API monitoring platform. It is an API observability tool that connects backend to Chrome devtools to inspect the latency of each API request. It allows developers to track API requests and resolve production issues in real time.
- 2025Seed$500K
#12
Series D · Palo Alto, California · founded 2016 · 39 employees$280.7Mraised▾
AI based API security software. It leverages AI that detects and prevents API attacks. It provides behavioural threat protection solution to secure, and manage the APIs in real time. The platform provides insights into the security posture of the APIs. It allows users to detect and fix the vulnerabilities in the API and share the remedies with team.
- Sep 2022Series D—
- Jan 2022Series D$140M
- May 2021Series C$70M
- Dec 2020Series B$30M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of API Management coverage by sub-theme.
Regulatory-risk over time flat
Funding & growth over time
funding rising · growth rising
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.